btrfs: move checks for DUMMY_ROOT into a helper
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 533657c5..ce1d71d 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1506,10 +1506,9 @@
struct btrfs_root *root,
struct extent_buffer *buf)
{
-#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
- if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))
+ if (btrfs_test_is_dummy_root(root))
return 0;
-#endif
+
/* ensure we can see the force_cow */
smp_rmb();